/*
 *   
 *
 * Copyright  1990-2009 Sun Microsystems, Inc. All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License version
 * 2 only, as published by the Free Software Foundation.
 * 
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License version 2 for more details (a copy is
 * included at /legal/license.txt).
 * 
 * You should have received a copy of the GNU General Public License
 * version 2 along with this work; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 * 
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
 * Clara, CA 95054 or visit www.sun.com if you need additional
 * information or have any questions.
 */

package javax.microedition.io.file;

/**
 * File system event handler.
 */
class FileSystemEventHandler extends FileSystemEventHandlerBase {

    /**
     * The polling interval for mount/unmount checks in millisec.
     * The default value is 2000 for consistency with QT.
     */
    private static final int POLLING_INTERVAL = 2000;

    /**
     * A thread polling for file root mount/unmount detection.
     */
    private static Thread monitorTimer;

    static {
        // Create monitoring thread
        /**
         * Polling thread.
         */
        monitorTimer = new Thread() {
            /**
             * The main loop
             */
            public void run() {
                try {
                    while (true) {
                        Thread.sleep(POLLING_INTERVAL);
                        checkFileSystem();
                    }
                } catch (InterruptedException ex) {
                }
            }
        };
        // Start the thread
        monitorTimer.start();
    }

    /**
     * Performs OS specific checking for a file root mount/unmount.
     */
    private native static void checkFileSystem();
}
